Fall is the ideal time to prune herbaceous and Itoh peonies, as they show signs of wilting and yellowing foliage. To prune peonies in the fall, use clean, sanitized pruning shears or scissors to remove all above ground debris. Herbaceous peonies should be cut back between October and November, after the first frost and when the foliage has turned yellow.
The best time to prune a peony bush is right after it blooms, not during the fall as with herbaceous or Itoh peonies. Cut all stems and dead foliage down to the base of the plant or ground level with a sharp pair of pruners. Remove plant debris from the garden and put them in your compost pile.
In the fall, wait until the foliage has died or fully yellowed after a hard frost. If you cut the peonies back too early, you reduce the time during which the foliage is absorbing sunlight to build the plant’s energy reserves, resulting in reduced bloom the next year. The best time to prune a tree peony is right after it blooms, not during the fall.
Herbaceous peonies should be cut back in fall, between October and November, after the first frost and when the foliage has turned yellow. Early fall or after the first frost is the ideal time to cut back the plants, as it helps remove foliar diseases and reduce infection.
In autumn, give tree peonies a light prune, as they generally respond well to a trim. To encourage a better growth habit, cut back the peonies as soon as you spot them on the leaves or a stalk.
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